I have an 09 23LSV with the HH 383 and it has the cats. Very quite compared to my buddies 06 malibu with the HH. My fuel economy is up quite a bit from my 06 vlx with the monsoon 340, I didn't expect that but I'll take it. Boat has a 55 gallon tank and I had it out friday, sat, and sun last weekend during the 4th surfing and wakeboarding, even pulled a tube for a few runs for some kids. Burned half a tank and put 12 hours on the boat.
As for exhaust smell I honestly can't tell a difference from my non-cat 06 to this boat.
(Message edited by 05mobiuslsv on July 11, 2009)